XRT79L71_1 Datasheet, PDF (61/434 Pages) Exar Corporation – 1-CHANNEL DS3/E3 ATM UNI/PPP/CLEAR-CHANNEL FRAMER IC -

XRT79L71
REV. 1.0.0
1-CHANNEL DS3/E3 ATM UNI/PPP/CLEAR-CHANNEL FRAMER IC - REGISTER/MAP DESCRIPTION
TRANSMIT UTOPIA INTERFACE BLOCK - ATM UNI APPLICATIONS
This section presents the Register Description/Address Map of the control registers associated with the
Transmit UTOPIA Interface blocks for ATM UNI Applications. The Register Description/Address Map of these
control registers for PPP Applications will be presented in the next section.
TABLE 3: TRANSMIT UTOPIA INTERFACE BLOCK - REGISTER/ADDRESS MAP - ATM UNI APPLICATIONS
ADDRESS LOCATION
REGISTER NAME
TYPE
DEFAULT
VALUE
TRANSMIT UTOPIA INTERFACE CONTROL REGISTERS
00x580
Reserved
R/O
0x00
0x0581
Transmit UTOPIA Interface - Transmit Control Register - Byte 2
R/W
0x38
0x0582
Transmit UTOPIA Interface - Transmit Control Register - Byte 1
R/W
0x00
0x0583
Transmit UTOPIA Interface - Transmit Control Register - Byte 0
R/W
0x00
0x0584 - 0x0592 Reserved
R/O
0x00
0x0593
Transmit UTOPIA Interface - Port Address Register
R/W
0x00
0x0594 - 0x0596 Reserved
R/O
0x00
0x0597
Transmit UTOPIA Interface - Port Number Register
R/W
0x00
0x0598 - 0x10FF Reserved
R/O
0x00
Transmit UTOPIA Interface - Transmit Control Register - Byte 0 (Address = 0x0583)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
Transmit
UTOPIA
Level 3
Enable
Multi-PHY
Polling
Enable
Back to Back Direct Sta- Transmit UTOPIA Data Bus
Polling tus Indication
Width
Enable
Enable
Cell Size[1:0]
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
1
1
0
0
1
1
1
1
BIT NUMBER
NAME
7
Transmit UTOPIA Level 3
Enable
TYPE
R/W
DESCRIPTION
Transmit UTOPIA Level 3 Enable:
This READ/WRITE bit-field configures the Transmit UTOPIA
Interface block to operate in either the UTOPIA Level 1 or 2 or
UTOPIA Level 3 Mode as described below.
0 - Configures the Transmit UTOPIA Interface block to operate in
the UTOPIA Level 1 or 2 Mode.
1 - Configures the Transmit UTOPIA Interface block to operate in
the UTOPIA Level 3 Mode.
NOTE:
This particular bit-field only configures the Transmit
UTOPIA Interface block. The user must set Bit 7
(UTOPIA Level 3 Enable) within the Receive UTOPIA
Control Register - Byte 0 (Address = 0x0503) in order to
configure the Receive UTOPIA Interface block into the
appropriate UTOPIA Level).
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